I have a tank bracket made by 4bs model th-140 for 4-1/2" to 5-1/4 inch diameter. I used it to hold my blichmann hop rocket. Worked great. It was a little big but worked good if you tighten it down. The hop rocket never slid out. I had it welded to my brew stand so there is a little weld left on it but it would grind off no problem or just use the bolt holes. Im asking 35 shipped.